# Engineering analysis notes (`docs/analysis/`)

**Last Updated:** 2026-04-01

Long-lived **technical** notes (blog CSS split, comparison tables, selector mapping JSON, etc.).

**Completed research packs** belong under `docs/archive/` — e.g. UTM cleanup analyses: [../archive/2026-04-01-docs-cleanup/utm-cleanup-analysis/](../archive/2026-04-01-docs-cleanup/utm-cleanup-analysis/).

Prefer **one** authoritative write-up per topic; link from `docs/systems/` or `docs/guides/` instead of duplicating summaries here.